Hi, I am starting graduate work next fall in biophysics, mostly simulations. It's not that biophysics doesn't appeal to me, but my primary interests are in particle theory. Eventually, I would want to learn qft, gr, geometry and topology, the essentials for understanding superstring theory. Only thing that is stopping me from wholeheartedly following particle theory is the dearth of postdoc positions in the field, and I have some student loans to pay off after graduate school. I was wondering if I can work on both fields in tandem and still make meaningful contributions in either of the fields. I know my plans sound a little too grandiose, but I would like to know if anyone has ever done anything like that, and if such a thing is feasible. Any input will be highly appreciated ! P.S. : I don't mind having no life.